EP3846925A1 - Mixer with arm - Google Patents
Mixer with armInfo
- Publication number
- EP3846925A1 EP3846925A1 EP19759605.9A EP19759605A EP3846925A1 EP 3846925 A1 EP3846925 A1 EP 3846925A1 EP 19759605 A EP19759605 A EP 19759605A EP 3846925 A1 EP3846925 A1 EP 3846925A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- protective
- protective part
- mixing
- mixing arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 237
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000009415 formwork Methods 0.000 claims description 5
- 208000035874 Excoriation Diseases 0.000 description 19
- 238000005299 abrasion Methods 0.000 description 19
- 239000000463 material Substances 0.000 description 8
- 239000004566 building material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009416 shuttering Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
- B01F27/052—Stirrers with replaceable wearing elements; Wearing elements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/07—Stirrers characterised by their mounting on the shaft
- B01F27/071—Fixing of the stirrer to the shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/07—Stirrers characterised by their mounting on the shaft
- B01F27/072—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis
- B01F27/0726—Stirrers characterised by their mounting on the shaft characterised by the disposition of the stirrers with respect to the rotating axis having stirring elements connected to the stirrer shaft each by a single radial rod, other than open frameworks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
- B01F27/211—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts characterised by the material of the shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
Definitions
- the invention relates to a mixer, in particular a building material mixer such as an asphalt or concrete mixer, according to the preamble of claim 1, a protective section for a mixer according to claim 12 and a method for protecting the shaft and / or mixing arms of a mixer according to claim 13.
- Mixers generally consist of a container with at least one driven shaft, to which mixing arms carrying approximately perpendicular to the shaft or at a defined angle to the same blades are fastened at intervals from one another.
- the blades are arranged at a distance from the inner wall of the container.
- the mixing arms preferably have an inner part connected to the shaft and an outer part carrying the blades. These two parts are preferably connected to each other by means of an adjustable, screw-connecting device.
- known building material mixers such as. B.
- the object of the invention is to provide a mixer whose components are particularly resistant to abrasion.
- the present invention is realized at least when preferably detachable fastening elements between the individual components such as shaft and / or mixing arm and / or shovel are surrounded as a whole or in each case by a protective section.
- a protective section can be a clamp or casing, which surrounds the individual areas or shaft / fastening elements / mixing arms in their entirety.
- the protective part should reliably protect the areas below protect against abrasion but also be easily removable from them. In particular, welding or other permanent connection to the areas to be protected should be avoided, which only enables the protective part to be detached from the areas to be protected by destroying the same.
- a protective section can be any element which protects the essential components, in particular the shaft and / or the mixing arm which holds the blade, from abrasion and surrounds these parts.
- the protective part can be formed from any resistant material, in particular from a metal, a metal alloy, a plastic or a ceramic.
- the protective section can in principle have any external shape, but a shape in which the protective section surrounds the shaft and / or fastening elements and / or the mixing arms is particularly preferred.
- the protective part can have functional areas which, for example, also have a mixed function (for example wings, wipers or a blade-like structure).
- the protective section is provided according to the invention in any case if it preferably surrounds the above-mentioned components in a protective manner and / or can be attached to the parts in a simple manner and / or can be removed in a simple manner for replacement even if the protective section is possibly destroyed.
- one-part or multi-part protective part segments can be provided, which in their entirety can form the protective part.
- a multi-part construction it can in particular be shell parts which jointly surround at least one area of the mixer (arm and / or arm holder and / or mixer shaft).
- the shell parts of a certain area can be held by a protective section of an adjacent area.
- a (multi-part) casing can be held as a protective section of the mixer shaft by protective sections of adjacent arm holders provided on the end side of the mixer shaft.
- a receptacle can be provided in particular on the protective parts of adjacent arm holders, on or behind or in which the casing can be accommodated as a protective part of the mixer shaft (shaft).
- the components can in particular be referred to as driven mechanical means for carrying out the mixing process, with stirring tools (eg mixing arm / shovel) passing through the material being provided.
- stirring tools eg mixing arm / shovel
- the arrangement and / or removal of the protective section should preferably be carried out without the use of tools (in particular those which cause danger), such as cut-off machines or cutting torches.
- the fastening elements in a mixer which connect the individual components to one another, are particularly susceptible to the abrasion caused by the mix.
- load-bearing elements such as the shaft or the mixing arms, particularly in the case of long-term use, are subject to significant wear.
- Wear protection elements can in this case be provided as protective part segments, which are preferably formed in one piece or in multiple pieces, in particular in two or three pieces.
- a protective part segment which in particular protects the mixing arm, can be fixed between the blade and shaft or between the blade and fastening element of the mixing arm.
- the protective part segment of the mixing arm between the blade of the mixing arm and protective part segment of the attachment is particularly preferred.
- Fixing element set A (further) protective part segment, which protects a fastening element, can be releasably connected to it, in particular connected to it by means of releasable plug-in, snap-in, snap-in and / or bayonet connections.
- a protective part segment, which protects at least part of the shaft can be defined between the protective part segments of two adjacent mixing arms and / or between the protective part segments for fastening elements of adjacent mixing arms.
- the protective part segments on the mixing arm and fastening element, on the mixing arm, fastening element and shaft or on the fastening element and shaft are a functional unit and preferably form a continuous protection between these elements.
- Such a preferably mutually dependent arrangement of individual protective part segments of the protective part according to the invention provides a particularly simple detachability of the protective armor around the individual elements.
- the protective part segment surrounding the mixing arm can be easily stripped off or pulled down from the protective arm.
- the detachable connection of the protective part segment for the respective fastening element can be provided protected under the protective part segment for the mixing arm or an extension thereof, as a result of which this is protected against abrasion.
- the protective part segment of a fastening element can be formed in two parts, a first part, preferably facing the mixing arm, being held in position by the protective part segment through the protective part segment of the mixing arm, preferably in combination with the mixer blade.
- the first part can be fixed between the protective section of the mixer arm and the fastener.
- a second part of the protective part segment of the same fastening element which can face away from the associated mixer arm, can be connected to the fastening element, preferably via a snap or snap connection.
- the connection of the second part of the protective part segment to the fastening element can be protected under the first part or protected between the first and the second part. This can prevent the connection from being actuated and / or released accidentally. If the protective part segment for the mixing arm and / or for the fastening elements of the individual mixing arms is removed, the elements held on these protective part segments can be removed (locked), preferably fixed, protective part segment of the shaft.
- the protective part segment (s) for the respective mixing arm and / or for the respective fastening elements of the individual mixing arms can accordingly hold the protective part segment (s) of the shaft in position on the shaft.
- Protective part segment (s) of a shaft segment / shaft section is / are preferably fixed between two mixing arms on the protective part segments of adjacent / adjacent mixing arms and / or on adjacent / adjacent fastening elements of the individual mixing arms on the shaft (in the longitudinal direction of the shaft).
- the respective segments can be arranged around the component to be protected and enclose it at least along one direction / side.
- the individual segments can have a collar-like design and surround the respective components of the mixer according to the invention in a collar-like manner.
- a collar-like shape should in particular partially or completely enclose Designate the arrangement of the protective section on the mixer.
- the arrangement of the individual protective part segments around the component of the mixer to be protected can also be inherently positive.
- the protective part segment for the shaft is provided as a formwork, which is arranged between two adjacent mixing arms around the shaft.
- the protective part segment for the shaft can be formed in one piece and preferably arranged in the factory when the mixer is assembled around the shaft between two adjacent mixing arms.
- the casing around the shaft is formed in several parts, preferably in two parts, the individual parts of the multipart casing along the longitudinal axis of the shaft having a contact area with one another or together enclosing the shaft .
- a protective part segment for the shaft can have any number of formwork components.
- the casing of the shaft is provided as a protective section from two, preferably identical, half-shells, each of which extends over the length between two adjacent mixing arms. At least in one inner area of the casing, these can represent a partial area, in particular a half, of the circumference of the area of the shaft to be protected, as a result of which the protective part segment for the shaft in the operating state can be arranged in a form-fitting manner on the outer circumference of the shaft.
- the protective part segment for the shaft can also be provided at a distance, in particular without a form fit, with an outer contour of the shaft to the same in the operating state.
- the protective part segment is formed in one piece for a mixing arm.
- This protective segment can preferably be sleeve-shaped and have a shape on its inner wall which corresponds approximately to the outer contour of the mixing arm.
- the form fit between the mixing arm and the protective party segment for the mixing arm thus provided prevents the mixing arm from wearing out due to a possible rotary movement of the protective element around the mixing arm. This applies in particular if the mixing arm has a non-rotationally symmetrical shape in the longitudinal direction.
- the protective part segment for the mixing arm is particularly preferably provided at least between the blade and the shaft or between the blade and the fastening element, preferably between the blade and the protective part of the fastening element. As far as the blade is arranged on the mixing arm, this can prevent the protective part segment for the mixing arm from detaching from the same, since the blade blocks the path.
- the mixer has a fastening element for the respective mixing arm, by means of which the mixing arm is, preferably detachably, fastened to the shaft and / or that the protective part segment for the mixing arm is in the region of the fastening element has an extension in which at least part of the fastening elements can be placed, preferably the part which is arranged on a side of the shaft facing the mixing arm.
- the extension can basically be made in one piece but also in several pieces with the protective part segment for the mixing arm.
- the extension can in particular be an extension of the segment by said functionality and / or refer to an area of the protective part segment for the mixing arm that widens in diameter.
- the extension can serve in particular to protect against wear of at least part of the fastening element.
- a mixing arm can thus also be understood to mean a combination of fastening device for the mixing arm and the mixing arm itself.
- the extension mentioned above is particularly preferably designed on its inner circumference as a semicircular / half-shell-shaped element or at least has such a shape on its inner circumference that it corresponds to the outer contour of the fastening element in the region which faces the mixing arm on the shaft is covered by the extension. In this way, a form fit with the fastening element can be provided.
- the aforementioned expansion preferably has a smooth, in particular rounded, shape. In particular, this can prevent excessive abrasion.
- An expedient development of the present invention is that the mixer has a fastening element for the mixing arm, by means of which the mixing arm is fastened to the shaft, and that the fastening element on a side of the shaft opposite the mixing arm has a fastening element protection part segment which at least the fastening element partially surrounds.
- the (separate) extension can also be referred to as a shell or half shell, which is adapted with its inner contour to at least part of the fastening element.
- the shell or half shell can have a connection or contact area to the protective part segment for the protective arm, so that these form a form-fitting protective section unit for arm and fastening element.
- the extension of the protective part segment for the mixing arm can also be referred to as the first part of the protective part segment for the fastening element.
- the fastener protection section can also be referred to as the second part of the protection section for the fastener.
- the first part and the second part can completely surround the fastening element on (a region of) the outer circumference.
- the extension of the protective part segment for the mixing arm and the fastening element protective part segment preferably form a rounded or / or closed outer contour, which can roughly correspond to the shape of a hollow cylinder coaxial with the shaft.
- this cylindrical shape arranged axially at the end, can have radially inwardly projecting regions laterally to the fastening element, which can form-fit with the shaft inside the fastening element or the protective part segment of the shaft.
- first part of the protective part segment for the fastening element and / or the second part of the protective part segment for the fastening element have a receptacle or receiving parts in which the protective part segment (s) of the shaft is / are definable.
- the extension of the protective part segment for the mixing arm (the first part of the protective part segment for the fastening element) and / or the fastening element protective part segment (the second part of the protective part segment for the fastening Tightening element) can each have a receptacle, which defines the protective part segment for the shaft radially and / or axially with respect to the shaft.
- the receptacles of the extension of the protective part segment for the mixing arm and the fastening element protective part segment can together form an interrupted or uninterrupted, preferably an approximately circular, sleeve.
- the protective part segment for the shaft can be received axially to the shaft and can be fixed radially to the same.
- one of the extensions of the protective part segment for the mixing arm and the fastening element protective part segment preferably has an uninterrupted or interrupted, preferably an approximately semicircular, that is to say partially circular, receptacle, which in its inner contour roughly corresponds to the outer contour of a multi-part casing of the protective part segment for the shaft.
- the protective part segment of the shaft which is respectively partially / partially provided between two adjacent mixing arms, is fixed between the protective part segment for the mixing arm in the region of the fastening element and / or the fastening element protective part segment of the adjacent mixing arms.
- the individual formwork parts are thus fixed between the individual protective part segments of two adjacent mixing arms. It may therefore be necessary to remove the formwork parts forming the protective part segment. be loaned to first detach at least one of the protective part segments from the mixing arm and / or the fastening element.
- the aim is to ensure that the protective part or the individual protective part segments at least surround the connecting means and / or connecting parts in a protective manner by a shaft with a mixing arm and / or a mixing arm with a shovel.
- the receptacle on the extension of the protective part segment for the mixing arm can also be provided directly on the protective part segment for the mixing arm.
- a protective part according to the invention is characterized in that it surrounds the mixing arm and / or the fastening element and / or the shaft in each case at least in regions, preferably the device according to the invention overall forms a complete sheathing of the above-mentioned assemblies of a building material mixer, so that only the shovel and the Wear protection itself is exposed to abrasion worth mentioning during operation.
- the fastening element can be part of the mixing arm.
- the protective part is intended to prevent abrasion of fastening elements between the shaft and mixing arm or mixing arm and shovel.
- the protective section can also be provided in such a way that it covers flat areas of Protects shaft, fastener and / or mixing arm from abrasion while the mixer is operating.
- the protective section can be made of a particularly abrasion-resistant material, such as a particularly hard steel or cast alloy.
- the protective part can have armored elements which additionally protect areas of the protective part which are particularly at risk of abrasion.
- the protective part can be provided with a lower total weight or total volume, since the armor can be provided particularly where the abrasion or the abrasive influences of the mixed material on the elements described according to the invention occur particularly strongly.
- a correspondingly thinner-walled material can be used in other areas of the protective section, which experience has shown to be less abrasion.
- the protective section can surround the shaft like a second skin and / or fastening element and / or the mixing arms in the operating state, as a result of which at least these particularly abrasion-sensitive areas of the mixer are protected inside.
- the protective part segments can also be provided only on the fastening elements and / or the shaft.
- the method according to the invention for protecting shaft, mixing arms and / or fastening elements of the same against closure in a mixer is characterized in that a protection element according to the invention is arranged on the shaft and / or mixing arm and / or fastening element in the manner described above.
- Fig. 1 is a schematic representation of an inventive
- Fig. 2 is an exploded view of an inventive
- FIG. 3 shows a side view of a section of the protective section according to the invention, which surrounds at least two mixing arms and a corresponding shaft section,
- FIG. 4 is a perspective view of Figure 3 without a shaft.
- FIG. 1 shows a schematic cross-sectional view through a mixer 10 according to the invention. This has a housing 50, in which a shaft 40 is provided such that it can be driven in rotation.
- a plurality of mixing tools 60 can be arranged on the shaft 40, which can have at least one shovel 30 and / or a mixing arm 20, wherein the mixing arm can be provided with a fastening element by means of which it can preferably be detachably attached to the shaft 40.
- FIG. 2 shows an exploded view of a mixing arm according to the invention with a blade 30 and an exemplary illustration of the protective part segments 23, 23a, 23b, 24, 25a and 25b according to the invention, from which the protective part can be formed.
- the mixing arm 20 can have a first elongated region 21 a, which connects the shaft 40 to the blade 30. Furthermore, a fastening element 22a, 22b is preferably provided in the region of the connection between shaft 40 and mixing arm 20, by means of which the mixing arm 20 can preferably be detachably fastened to the shaft 40.
- a screw connection 29 with corresponding recesses can be provided in order to fix the fastening element 22a, 22b to the shaft 40, for example as a clamp connection in a force-fitting and / or form-fitting manner.
- the fastening element 22a, 22b is formed in two parts, the two parts enclosing an opening 22c in which the shaft 40 is provided in the operating state.
- the shaft can have a shape along its outer contour, at least in the area of the fastening element, which corresponds approximately to the inner contour of the opening 22c.
- the screw connection 29 preferably has a recess at least on the first part of the fastening element 22a, that is to say on the part of the fastening element 22a, 22b on which the screw head can be provided and can be secured against rotation, in which the screws for the Screw connection 29 are countersunk relative to an outer circumference of the fastening element 22a.
- the outer circumference of the fastening element 22a, 22b can be approximately circular or cylindrical.
- a shovel 30 can be arranged at an upper end of the mixing arm 20, as is apparent, for example, from DE 10 2016 108 310 or PCT / EP2017 / 078089.
- the content of these publications, which relates to a blade and / or the connection of the blade to a mixing arm, is accordingly intended to be part of this application by reference.
- This blade 30, which is particularly preferably detachable from the mixing arm 20, can be connected to the mixing arm 20 via, for example, a groove, bayonet or snap-in connection.
- a screw 31 which can be countersunk in a housing part 32 can be provided, which can be protected, for example, by a protective cap 33 from abrasion or contamination.
- the protective section according to the invention for protecting the shaft 40 and / or the individual mixing arms 20 can preferably be constructed in segments. Segments 23a, 23b, 24, 25a and 25b are shown by way of example in FIG. 2 for such a protective section. According to the invention, it is particularly preferred that the arrangement and / or the removal of the individual protective part segments from shaft 40 or mixing arm 20 can be carried out without tools (or with simple tools) as far as possible. On the one hand, this should offer an accelerated exchange with other protection concepts and, on the other hand, it should make the protection section less susceptible to defects.
- the mixing arm is provided with the elongated portion 21a, which forms the transition between the fastening element 22a, 22b and the blade 30.
- the elongated portion 21 a can have any shape or extension and, for example, also comprise scoop-like segments or shapes.
- a sleeve-like protective section 23a is provided for the elongated section 21a, the inner circumference of which corresponds approximately to the outer circumference of the elongated section 21a.
- This protective party segment 23a can in particular protect the elongated portion 21a from wear due to the abrasive action of the mix and preferably completely surrounds the elongated portion 21a in the longitudinal direction, ie from the end of the fastening element facing the mixing arm to the blade.
- the protective part segment 23a and / or the further protective part segments 23b, 24, 25a and 25b can each have additional elements on their outer circumference which support mixing of the material to be mixed in the mixer in the operating state.
- additional elements on their outer circumference which support mixing of the material to be mixed in the mixer in the operating state.
- further wing-like, shovel-shaped and / or other mixing tools or shapes deviating from a round shape can be provided.
- a mixing surface 23 ' is provided on the protective part segment 23a, which can also be provided with armor plating, as a result of which Protective part segment 23a is particularly resistant to wear.
- the mixing surface 23 ' can provide an additional mixing surface and thus have a positive influence on the mixing action of the mixer.
- a fastening element 22a, 22b adjoins the elongated portion 21a, by means of which the mixing arm 20 can be fixed on the shaft 40. 21a and 22a can also be made in one piece.
- the fastening element 22a, 22b preferably has a releasable connection to the shaft.
- the fastening device can preferably be formed in two parts.
- the fastening element 22a, 22b can expediently be provided with an enlarged diameter in relation to the elongated part 21a. In particular, this can provide an increased contact area between shaft 40 and fastening element 22a, 22b than if the fastening element 22a, 22b has the same diameter as the elongated part 21a.
- the fastening element can have an approximately cylindrical outer contour, which is preferably at least partially aligned coaxially to the longitudinal axis of the shaft 40.
- an extension 23b can be provided which covers the fastening element 22a, 22b at least in some areas and thus protects against abrasion.
- the extension 23b can in principle be formed in one piece with the protective part segment 23a. However, it is advantageous that in the area of the fastening element 22a, 22b at least one separately provided, but preferably connectable to the protective part segment 23a, protective part segment 23b can be provided.
- the protective section 23b can also be referred to as an extension of the protective section 23a for the mixing arm 20. Extension in this sense can affect both the composition of the mixed game segment from at least two Parts (first part for the mixing arm, second part for the fastening element 22a) and also a spatial extension, in particular the width, relative to the protective part segment for the mixing arm - in other words, a one-piece construction of 23a and 23b.
- a protective part segment for the fastening element 22a and the mixing arm 21a can also be provided together, which has approximately a uniform outer contour, without or only with a slight expansion.
- the protective part segment can also be constructed in several parts in this case.
- the protective part segments for all components of the mixer 10 according to the invention advantageously form a self-contained protective part surface as armor which is flush with the outside.
- Both the protective part segment 23b for the part of the fastening element 22a which faces the mixing arm 20 and the protective part segment 23a can be provided / locked in place on the mixing arm 21a by attaching the blade 30.
- the blade 30 can prevent the protective part segments from accidentally falling out. This fact can also apply if the protective part segment 23a for the mixing arm 21a and the fastening element 23b, in particular for the part of the fastening element 22a which faces the mixing arm 21a, is formed in one piece. Because the blade 30 fixes the protective part segment (s) 23a / 23b on the mixing arm 21a, additional fastening means for the protective part segments on the Mixing arm can be dispensed with. The protective part segments can thus be enclosed between the blade 30 and the fastening device.
- a protective part segment 24 can be provided which surrounds this region of the fastening element 22b.
- this too can correspond on its inner circumference to the outer circumference in the form, dimension and / or dimension of the element to be protected.
- this can have at least one fastening means 28, by means of which the protective part segment 24 can be fixed on a part of the fastening element 22a / b.
- This can be, in particular, a releasable latching or snap connection which engages in a corresponding recess or undercut on the fastening element 22a / b.
- the fastening means 28 can in particular be arranged on an inner circumference of the protective part segment 24, as a result of which it is protected at least in regions from abrasion in the operating state of the mixer 10. If a region of the fastening means 28 protrudes beyond an edge of the protective part segment 24, this can be covered by the protective part segment 23b or by the protective part segment which extends between the blade 30 and the fastening element 22a. This can also prevent unintentional detachment of the armor 24, since this opposite protective part segment, spatially opposing a release movement of the fastening means.
- the protective part segment 24 preferably has at least one fastening means 28 on opposite sides. If all of the protective part segments (23a, 23b and 24) described so far are provided on the mixing arm, this is preferably encased completely, that is to say observed from the blade 30, by the protective part segments, that is to say a total of one protective part.
- the only areas which are preferably not taken into account here are both an opening 22c, which is also delimited by a radially inwardly projecting collar of the protective part segments 23b and 24, and through which the shaft 40 is guided and the area on the mixing arm 20, on which the blade 30 is preferably releasably attached. This area is occupied by the wave and covered by the wave protection segments.
- the radial collar (26, 27) can also be radially spaced from the opening 22c.
- the protective part segments of the fastening device can have a receptacle 26, 27 in the region of the shaft, which extends approximately parallel to the longitudinal axis of the shaft 40.
- This longitudinal axis 41 is shown by way of example in FIG. 3.
- the receptacle 26, 27 provided can be provided on an outside of the protective part segments for the mixing arm 20 and / or fastening element 22a, 22b such that its inner circumference corresponds approximately to an outer circumference of a protective part segment 25a, 25b for the shaft 40.
- the protective part segment for the shaft 40 / the shaft segment can in particular be in each case between two mixing arms or two fastening elements or two protective part segments of two adjacent fastening devices extend.
- the receptacles 26, 27 can be provided on both adjacent mixing arms or two fastening elements or two protective part segments of two adjacent fastening devices, between which the protective party segment for the shaft 40 is fixed between the receptacles of the two adjacent mixing arms 20.
- the receptacle 26, 27 can in principle also be a depression in the protective part segments of the mixing arm 20 or, for example, also a spring groove connection with the same.
- the definition of the protective part segment for the shaft 40 should not be restricted to certain structural details. Rather, it should be important that the protective party segment for the shaft 40 can be fixed between two mixing arms 20 or its protective part segments or two fastening elements or two protective part segments of two adjacent fastening devices, that is, preferably only loosening the protective part segment for the shaft 40 should be made possible if at least one of the protective part segments for the mixing arm 20, with its fastening element 22a, 22b, is detached from the mixing arm or the protective part segments of the corresponding fastening devices are detached.
- the protective part segment for the shaft 40 particularly preferably has a casing which is formed from at least two shell parts 25a, 25b.
- An inner contour of the casing can roughly correspond to an outer contour of the shaft, but in the operating state it can also be provided at a distance from the shaft, that is to say a larger inner diameter than the outer diameter of the shaft.
- the shaft and its casing can in principle have a shape that deviates from the round shape, or else with a polygon, preferably a polygon cross section can be provided (see reference numeral 40 in FIG. 5).
- the protective part segment 25a, 25b for the shaft 40 or the casing can have a smooth or rounded surface in order to prevent unnecessary friction with mixed material in the operating state.
- the protective part segment for shaft 40 can also have mixing tools on its outer circumference.
- the casing for a shaft section between two mixing arms 20 has two half-shells 25a and 25b, which each extend along a longitudinal axis of the shaft 40 and are each assigned to one of the receptacles 26 and / or 27 of the two adjacent mixing arms.
- the fastening element 22a and 22b is covered by two separate protective part segments 23b and 24, each of the two protective part segments can have a receptacle 26, 27 which approximately corresponds in shape to the outer contour of the shell halves 25a and 25b.
- the two receptacles 26, 27 form approximately a circular shape, which can be interrupted or uninterrupted, the two shuttering parts being held on the end of the respective mixing arm 20 by the receptacles 26, 27 or being pressed against one another, as a result of which these can be fixed both radially and axially on the shaft between the two mixing arms.
- a receptacle in the manner described above or a protective part segment of the shaft 40 is provided at least when the receptacle is provided in an area of the protective part segment for the mixing arm 20 or its fastening element 22a, 22b and a protective part segment element for the shaft 40 in the operating state so that falling out or slipping out is prevented in a shell-like structure, for example with half shells which extend in the longitudinal direction of the shaft 40.
- FIG. 3 shows a section of a shaft 40 with two mixing arms arranged thereon (preferably completely encased with protective elements, preferably without covering the blade) 21a, blades 30 attached to it and the protective part segments provided for these elements to form a protective part.
- Both mixing arms 20 have a protective part segment 23a, which is approximately vane-shaped on its outer contour.
- the protective section 23a merges into the protective section 23b, with which this can be formed in one piece or in several pieces.
- the protective section 25a and 25b for the shaft 40 is provided between two adjacent mixing arms 20. And fixed by the receptacles 26, 27 on the mixing arms 20 in their position along the shaft 40.
- the receptacles 26, 27 are also provided on the sides of the two mixing arms 20 facing away from the protective section 25a, 25b for the shaft 40, in order to accommodate a protective section 25a and 25b for the shaft 40 between adjacent mixing arms 20 to the right or left can.
- a protective section 24 is arranged in a lower region on both mixing arms 20 and protects part of the fastening element 22b, which is arranged opposite the mixing arm 20 on the shaft 40 in the axial direction, against abrasion.
- the fastening means 28 on the right mixing arm is indicated as an element protected by the protective part segment 24 or 23b.
- the gap shown in Figure 3 to represent the fastener 28 can be closed in the operating state, whereby a continuous armor of the individual mixing arms including their fasteners is provided.
- the gap between the two shuttering segments 25a and 25b of the protective part segment for the shaft 40 can also be closed in the operating state.
- FIG. 4 shows a perspective illustration of the embodiment described in FIG. 3, the shaft 40 not being shown in the opening 22c.
- the protective segment 23a is not provided with a blade shape but rather with an elongated shape in FIG. 4, wherein an armored element 23 'can be provided in an operating direction, which is indicated in particular by the orientation of the blade 30, which can additionally protect the protective part segment 23a from abrasion.
- FIG. 4 shows particularly clearly how the protective part segment for the shaft 40 is fixed on the mixing arm between two mixing arms on the basis of the receptacle 26, 27.
- the relative alignment of the individual mixing arms with each other is irrelevant to the provision of the protective part segments for the shaft.
- the protective part segment for the shaft 40 can be fixed both axially and (and / or) radially against the protective part segments of the mixing arm on the receptacles 26, 27, as a result of which the half-shells shown in FIG. 4 fall out of the connection between the receptacles of two adjacent mixing arms 20 is prevented.
- the armor that is to say protective section segments for mixing arms, which have a further mixing arm neighbor on only one side, can also have receptacles 26, 27 for defining a protective section segment for the shaft 40 only on this side.
- the shaft 40 can be provided continuously, with all mixing arms 20 being provided on the same shaft 40.
- several shafts can be provided approximately parallel or at a defined angle to each other, each of which carries part of the mixing arms 20 and can each have a protective part.
- the shaft is protected by a combination of protective part segments for the shaft and protective part segments for the respective mixing arm or for the respective connecting element of the mixing arm, so that the shaft is completely surrounded by the individual protective part segments at least along the area of the mixing arms 20.
- the armoring of the shaft is preferably provided alternately by protective part segments for the shaft, in particular the casing 25a, 25b and the protective part segments for the respective mixing arm or for the respective fastening element 24, 23b.
- a scraper 70 can be provided on the shaft 40, preferably in the area of a fastening element, which moves along with the shaft rotation and can scrape the mixture from an inside of a seal between the shaft and the mixer housing (not shown).
- the wiper 70 preferably interacts with a collar on a protective part segment of a fastening element which is not occupied by a protective part segment for a shaft section. It is held in position by the protective part segment of a fastening element, so that falling / falling off the shaft is prevented.
- the scraper can be designed as a partial circular shape or partial polygonal shape on its inner contour
- a seal 80 in particular, can be placed between the individual protective part segments, in particular between that of the mixing arm and the fastening device a metal seal or elastic seal or fabric seal can be provided, which can seal the individual segments against the entry of mixed material.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Accessories For Mixers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18192248 | 2018-09-03 | ||
PCT/EP2019/073368 WO2020048929A1 (en) | 2018-09-03 | 2019-09-02 | Mixer with arm |
Publications (4)
Publication Number | Publication Date |
---|---|
EP3846925A1 true EP3846925A1 (en) | 2021-07-14 |
EP3846925C0 EP3846925C0 (en) | 2023-08-02 |
EP3846925B1 EP3846925B1 (en) | 2023-08-02 |
EP3846925B8 EP3846925B8 (en) | 2023-09-27 |
Family
ID=63490326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19759605.9A Active EP3846925B8 (en) | 2018-09-03 | 2019-09-02 | Mixer with arm |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3846925B8 (en) |
WO (1) | WO2020048929A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2727732A (en) * | 1954-06-24 | 1955-12-20 | Iowa Mfg Co Cedar Rapids | Pug mill paddle adjustable mounting means |
CH408743A (en) | 1962-05-16 | 1966-02-28 | Erbes & Co | Mixing device for concrete, asphalt and similar masses |
US3773436A (en) | 1971-09-14 | 1973-11-20 | Kenco Engin Inc | Shroud for asphalt mixer paddle |
US3738774A (en) | 1971-12-16 | 1973-06-12 | K Lutz | Asphalt mixer tip and shank assembly |
EP0111148A3 (en) | 1982-11-26 | 1986-07-16 | Dipl.-Ing. H. List Industrielle Verfahrenstechnik | Stirring apparatus with a blow-sensitive protective layer |
EP0275700A1 (en) | 1986-12-29 | 1988-07-27 | Stauffer Specialty and Food Products Company, Inc. | Process for reducing color in fatty acid chlorides |
US5061082A (en) | 1989-11-27 | 1991-10-29 | J.C. Steele & Sons, Inc. | Replaceable pug mill blade |
DE4243664A1 (en) * | 1992-12-23 | 1994-06-30 | Verschleis Technik Dr Ing Hans | Concrete mixer arm made of fine-grained construction steel and surrounded by mantle of wear-resisting protective elements |
DE9410951U1 (en) | 1994-07-08 | 1994-09-15 | Fliegl Josef | Mixing paddle with an agitator |
EP0976442A3 (en) * | 1998-07-31 | 2002-06-05 | F. Zettl GmbH & Co. | Mixing device |
WO2006007778A1 (en) | 2004-07-02 | 2006-01-26 | Jiangsu Muyang Group Co., Ltd. | A Bladed Mixer |
DE102016108310A1 (en) | 2016-05-04 | 2017-11-09 | Ammann Schweiz Ag | construction material mixers |
-
2019
- 2019-09-02 EP EP19759605.9A patent/EP3846925B8/en active Active
- 2019-09-02 WO PCT/EP2019/073368 patent/WO2020048929A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP3846925C0 (en) | 2023-08-02 |
WO2020048929A1 (en) | 2020-03-12 |
EP3846925B1 (en) | 2023-08-02 |
EP3846925B8 (en) | 2023-09-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1871514B1 (en) | Mixing blade provided with a removable wearable element | |
EP0692215B1 (en) | Portable mixer | |
DE2926915C2 (en) | Blade housing for a hand-operated knife | |
DE19928034B4 (en) | Crushing and / or screening device | |
EP2160274B1 (en) | Shank chisel | |
EP2545757A1 (en) | Pointes de herse rotative | |
DE102015119813A1 (en) | Cleaning piston with nonpolar material and mixing head with cleaning piston and outlet channel | |
EP1477218B1 (en) | Mixing blade with releasable tip, tip for said mixing blade and mixing apparatus comprising such a mixing blade | |
DE102004063723B4 (en) | Protective shield for a cutting tool of a brush cutter | |
EP3846925B1 (en) | Mixer with arm | |
EP3856401B1 (en) | Shaking and/or mixing device | |
DE3918657C2 (en) | Rotor with protective caps | |
EP0976442A2 (en) | Mixing device | |
EP0743254B1 (en) | Filling device for distributing doses of highly viscous materials | |
DE102005031778A1 (en) | Cutting head for a brush cutter | |
DE19503276C1 (en) | Drive device for spring shaft of pipe cleaning machine | |
DE102018121430A1 (en) | Mixer with arm | |
EP3362603B1 (en) | Skid segment for an edge protection on a road milling machine and edge protection for a road milling machine | |
DE10218778B4 (en) | Scraper for the rollers of a roller mill | |
DE10064149A1 (en) | Comminution of solids including stone and wastes, employs twin parallel rotating shafts carrying intermeshing cutters and backing sections | |
DE1117440B (en) | Motorized hand tool for removing meat from bones | |
DE19703495C2 (en) | Trough mixer | |
EP3266343A1 (en) | Brush unit for a brush roller for an abrasive blasting installation | |
DE102011081050A1 (en) | Tool for a motor-driven kitchen appliance and kitchen appliance | |
EP3675992B1 (en) | Construction material mixer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210406 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 502019008800 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: B01F0007000000 Ipc: B01F0027052000 Ref country code: DE Ref legal event code: R079 Free format text: PREVIOUS MAIN CLASS: B01F0007000000 Ipc: B01F0027052000 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: B01F 27/70 20220101ALI20230125BHEP Ipc: B01F 27/211 20220101ALI20230125BHEP Ipc: B01F 27/072 20220101ALI20230125BHEP Ipc: B01F 27/07 20220101ALI20230125BHEP Ipc: B01F 27/052 20220101AFI20230125BHEP |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20230309 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
GRAT | Correction requested after decision to grant or after decision to maintain patent in amended form |
Free format text: ORIGINAL CODE: EPIDOSNCDEC |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502019008800 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PK Free format text: BERICHTIGUNG B8 |
|
RAP4 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: DETLOFF GMBH KOMPETENT IM VERSCHLEISSSCHUTZ |
|
U01 | Request for unitary effect filed |
Effective date: 20230829 |
|
U07 | Unitary effect registered |
Designated state(s): AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI Effective date: 20230905 |
|
U20 | Renewal fee paid [unitary effect] |
Year of fee payment: 5 Effective date: 20230929 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231202 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231102 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231202 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20231103 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20230802 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |